How do you get armpit stains out of white shirts?
How do you get armpit stains out of white shirts? If, however, your white tees still have some stubborn sweat stains, then it’s time to mix up some stain paste: 1 tablespoon hydrogen peroxide, 1 tablespoon salt, and 1/2 cup baking soda. Apply the paste directly to the sweat stain with a toothbrush, let it sit for at least and hour, and then wash as usual.